I had a Antergos KDE build and all was running well and decided to install Antergos-Openbox-Meta, and although Openbox generally works well, whenever I log into KDE, the icon theme resets itself to Numix-Square-Light. I change it in settings and apply, and the icon theme then does change, but if I log out and log in again to KDE, the icon theme is back to Numix-Square-Light. I believe this theme was the default for Openbox as when I first ran Openbox and Openbox/KDE, this was the theme used. Is there any way to fix this please? Cheers.

Not sure if this is relevant, but on my laptop the icon theme saving only worked after I switched to using sddm instead of lightdm.
For the record I switched to sddm to fix the kde-wallet issue.
I did not see such behaviour on the desktop box.
I did install a newer version of Antergos on the laptop, so that might explain why I saw different behaviour.